<?php

// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2014 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: 麦当苗儿 <zuojiazi@vip.qq.com> <http://www.zjzit.cn>
// +----------------------------------------------------------------------
namespace Think; 


class Page{

    public $firstRow; // 起始行数
    public $listRows; // 列表每页显示行数
    public $parameter; // 分页跳转时要带的参数
    public $totalRows; // 总行数
    public $totalPages; // 分页总页面数
    public $rollPage   = 9;// 分页栏每页显示的页数
    public $lastSuffix = true; // 最后一页是否显示总页数

    private $p       = 'p'; //分页参数名
    public $url     = ''; //当前链接URL
    public $nowPage = 1;
    
    //新加 搜索框    
    public  $search   =  false;

    // 分页显示定制
    private $config  = array(
        'header' => '<span class="rows">共 %TOTAL_ROW% 条</span>',
        'prev'   => '上一页',
        'next'   => '下一页',
        'first'  => '首页',
        'last'   => '末页',
        'theme'  => ' %up_page%  %link_page%  %down_page%  %header%',
    );

    /**
     * 架构函数
     * @param array $totalRows  总的记录数
     * @param array $listRows  每页显示记录数
     * @param array $parameter  分页跳转的参数
     */
    public function __construct($totalRows, $listRows=20, $parameter = array()) {
       
        C('VAR_PAGE') && $this->p = C('VAR_PAGE'); //设置分页参数名称
        /* 基础设置 */
        $this->totalRows  = $totalRows; //设置总记录数
        $this->listRows   = $listRows;  //设置每页显示行数
        $this->parameter  = empty($parameter) ? $_GET : $parameter;
      
        $this->nowPage    = empty($_GET[$this->p]) ? 1 : intval($_GET[$this->p]);
        $this->nowPage    = $this->nowPage>0 ? $this->nowPage : 1;
        
         /* 生成URL */
        $this->parameter[$this->p] = '[PAGE]';
        $this->url = U(ACTION_NAME, $this->parameter);
        /* 计算分页信息 */
        $this->totalPages = ceil($this->totalRows / $this->listRows); //总页数
        
        
        if(!empty($this->totalPages) && $this->nowPage > $this->totalPages) {
            $this->nowPage = $this->totalPages;
        }
        
        $this->firstRow   = $this->listRows * ($this->nowPage - 1);
    }

    /**
     * 定制分页链接设置
     * @param string $name  设置名称
     * @param string $value 设置值
     */
    public function setConfig($name,$value) {
       
        if(isset($this->config[$name])) {
            $this->config[$name] = $value;
        }
    }

    /**
     * 生成链接URL
     * @param  integer $page 页码
     * @return string
     */
    private function url($page){
        $page = max($page, 1);
        //echo str_replace(urlencode('[PAGE]'), $page, $this->url.$page);
        if(ACTION_NAME=="lists"){
            return str_replace(urlencode('[PAGE]'), $page, $this->url.$page.".html");
        }else{
            if ($page == 1) {
            return str_replace(urlencode('[PAGE]'), $page, rtrim($this->url, '_').".html");
        } else {
            return str_replace(urlencode('[PAGE]'), $page, $this->url.$page.".html");
        }
        }
    
    }

    /**
     * 组装分页链接
     * @return string
     */
    public function show() {
    
        if(0 == $this->totalRows) return '';

       

        /* 计算分页零时变量 */
        $now_cool_page      = $this->rollPage/2;
        $now_cool_page_ceil = ceil($now_cool_page);
        $this->lastSuffix && $this->config['last'] = $this->totalPages;
        //上一页
        $up_row  = $this->nowPage - 1;
        $up_page = '';
        
        if( $up_row > 0 ){
        
            $up_page =  '<a class="prev" href="' . $this->url(1) . '">首页</a><a class="prev" href="' . $this->url($up_row) . '">' . $this->config['prev'] . '</a>' ;

         
        }else{
           
            if($this->totalPages>=1)

            $up_page =  '';
             
            
        }

        //下一页
          $down_row  = $this->nowPage + 1;
        $down_page = '';
        
         if( $down_row <= $this->totalPages ){
         
              $down_page =  '<a class="next" href="' . $this->url($down_row) . '">' . $this->config['next'] . '</a>' ; 
         }else{
             
             if($this->totalPages>=1)
             $down_page =  '';
        }
          

        //第一页
        $the_first = '';
        if($this->totalPages > $this->rollPage && ($this->nowPage - $now_cool_page) >= 1){
            $the_first = '<a class="first" href="' . $this->url() . '">' . $this->config['first'] . '</a>';
        }

        //最后一页
        $the_end = '';
        if($this->totalPages > $this->rollPage && ($this->nowPage + $now_cool_page) < $this->totalPages){
            $the_end = '<a class="end" href="' . $this->url($this->totalPages) . '">末页</a>';
        }


      /*
        //数字连接
        $link_page = "";
        for($i = 0; $i < $this->rollPage; $i++){
            if(($this->nowPage - $now_cool_page) <= 0 ){
                $page = $i;
            }elseif(($this->nowPage + $now_cool_page - 1) >= $this->totalPages){
                $page = $this->totalPages - $this->rollPage + $i;
            }else{
                $page = $this->nowPage - $now_cool_page_ceil + $i;
            }
            if($page > 0 && $page != $this->nowPage){

                if($page <= $this->totalPages){
                    
                    if($i==2 && $this->nowPage>=6)
                    
                    $link_page .= '<a class="num" href="' . $this->url($page) . '">...</a>';
                    else
                    $link_page .= '<a class="num" href="' . $this->url($page) . '">' . $page . '</a>';
                    
                    
                }else{
                    break;
                }
                
                
                
            }else{
                if($page > 0 && $this->totalPages != 1){
                    $link_page .= '<span class="curr">' . $page . '</span>';
                }
            }
        }*/
        
        
        $link_page =  '';
        
        
        if( $this->totalPages > 1 && $this->nowPage >=4 ){
        
           $link_page .= '<a class="num" href="' . $this->url(1) . '">1</a> '; 
        
        }
        
        //echo $link_page;
        
        if( $this->nowPage>=5 ){
        
            
             $link_page .= '<a class="num dot" >...</a> ';
        
        }
        
        
        if( $this->nowPage - 2 > 0 ){
        
              $link_page .= '<a class="num" href="' . $this->url($this->nowPage-2) . '">'.($this->nowPage-2).'</a> ';
        
        } 
        
        
        if( $this->nowPage - 1 > 0 ){
        
              $link_page .= '<a class="num" href="' . $this->url($this->nowPage-1) . '">'.($this->nowPage-1).'</a> ';
        
        } 
        

        
        
        $link_page .= '<span class="curr">' . $this->nowPage  . '</span>';
        
        
        if( $this->nowPage + 1  <= $this->totalPages ){
        
              $link_page .= '<a class="num" href="' . $this->url($this->nowPage+1) . '">'.($this->nowPage+1).'</a> ';
        
        } 
        
        
        if( $this->nowPage + 2 <= $this->totalPages ){
        
              $link_page .= '<a class="num" href="' . $this->url($this->nowPage+2) . '">'.($this->nowPage+2).'</a> ';
        
        } 
        
        
        if( $this->nowPage == 2  &&  $this->totalPages > 5 ){
        
              $link_page .= '<a class="num" href="' . $this->url(5) . '">5</a> ';
        
        } 
        
        
            
        if( $this->nowPage == 1  &&  $this->totalPages > 5 ){
        
              $link_page .= '<a class="num" href="' . $this->url(4) . '">4</a> ';
              $link_page .= '<a class="num" href="' . $this->url(5) . '">5</a> ';
        
        } 
        
        
        
        if( $this->nowPage == 2  &&  $this->totalPages == 5 ){
        
              $link_page .= '<a class="num" href="' . $this->url(5) . '">5</a> ';
             
        
        } 
         
        if( $this->nowPage == 1  &&  $this->totalPages == 4 ){
        
              $link_page .= '<a class="num" href="' . $this->url(4) . '">4</a> ';
             
        
        } 
        
        
              
        if(  ($this->totalPages - $this->nowPage) > 3  ){
       
           $link_page .= '<a class="dot num">...</a>';
           $link_page .= '<a class="last_page num" href="' . $this->url($this->totalPages) . '">'.$this->totalPages.'</a>';
       
        }

        //替换分页内容
        $page_str = str_replace(
            array('%header%','%the_first%', '%now_page%', '%up_page%', '%down_page%', '%first%', '%link_page%', '%end%', '%total_row%', '%total_page%'),
            array($this->config['header'], $this->the_first, $this->nowPage, $up_page, $down_page, $the_first, $link_page, $the_end, $this->totalRows, $this->totalPages),
            $this->config['theme']
            
            );

        //替换分页内容
        $page_str = str_replace(
            array('%HEADER%', '%NOW_PAGE%', '%UP_PAGE%', '%DOWN_PAGE%', '%FIRST%', '%LINK_PAGE%', '%END%', '%TOTAL_ROW%', '%TOTAL_PAGE%'),
            array($this->config['header'], $this->nowPage, $up_page, $down_page, $the_first, $link_page, $the_end, $this->totalRows, $this->totalPages),
            $page_str);
            
         if($this->totalPages>1) $page_str.=    '<span class="total_pages">共 '.$this->totalPages.' 页</span>';
            
         if( $this->search &&  $this->totalPages>1 ) {  
            
             $page_str.= ' <span  class="goto">到 <input type="text" class="pn"  onkeyup="value=value.replace(/[^\d]/g,\'\'); if(value>'.$this->totalPages .') value=\'\';" > 页 </span> <a href="#" class="true">确定</a>' ;
                
        
         }
         
         return "{$page_str}";
        
    }
}
